(4.2+x)+x=723.8

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Solution for (4.2+x)+x=723.8 equation: 


Simplifying
(4.2 + x) + x = 723.8

Remove parenthesis around (4.2 + x)
4.2 + x + x = 723.8

Combine like terms: x + x = 2x
4.2 + 2x = 723.8

Solving
4.2 + 2x = 723.8

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 2x = 723.8 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 2x = 723.8 + -4.2
2x = 723.8 + -4.2

Combine like terms: 723.8 + -4.2 = 719.6
2x = 719.6

Divide each side by '2'.
x = 359.8

Simplifying
x = 359.8

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